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import mapnik
import os
import pytest
from .utilities import execution_path
@pytest.fixture(scope="module")
def setup():
# All of the paths used are relative, if we run the tests
# from another directory we need to chdir()
os.chdir(execution_path('.'))
yield
def make_map_from_xml(source_xml):
m = mapnik.Map(100, 100)
mapnik.load_map(m, source_xml, True)
m.zoom_all()
return m
def make_pdf(m, output_pdf, esri_wkt):
# renders a PDF with a grid and a legend
page = mapnik.printing.PDFPrinter(use_ocg_layers=True)
page.render_map(m, output_pdf)
page.render_grid_on_map(m)
page.render_legend(m)
page.finish()
page.add_geospatial_pdf_header(m, output_pdf, wkt=esri_wkt)
if mapnik.has_pycairo():
import mapnik.printing
def test_pdf_printing(setup):
if not os.path.exists('../data/good_maps/marker-text-line.xml'):
pytest.skip('Missing data')
source_xml = '../data/good_maps/marker-text-line.xml'.encode('utf-8')
m = make_map_from_xml(source_xml)
actual_pdf = "/tmp/pdf-printing-actual.pdf"
esri_wkt = 'GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]'
make_pdf(m, actual_pdf, esri_wkt)
expected_pdf = 'images/pycairo/pdf-printing-expected.pdf'
diff = abs(os.stat(expected_pdf).st_size - os.stat(actual_pdf).st_size)
msg = 'diff in size (%s) between actual (%s) and expected(%s)' % (diff, actual_pdf, 'tests/python_tests/' + expected_pdf)
assert diff < 1500, msg
# TODO: ideas for further testing on printing module
# - test with and without pangocairo
# - test legend with attribution
# - test graticule (bug at the moment)
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